LTC3856EFE#PBF Linear Technology, LTC3856EFE#PBF Datasheet - Page 3

• Manufacturer Part Number: LTC3856EFE#PBF
• Description: IC DCDC SWITCH
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC3856EFE#PBF

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.6 ~ 5 V
• Frequency - Switching: 250kHz ~ 770kHz
• Voltage - Input: 4.5 ~ 38 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 38-TSSOP Exposed Pad, 38-eTSSOP, 38-HTSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Power - Output: -

elecTrical characTerisTics
orDer inForMaTion
LEAD FREE FINISH
LTC3856EFE#PBF
LTC3856IFE#PBF
LTC3856EUH#PBF
LTC3856IUH#PBF
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to:
For more information on tape and reel specifications, go to:
junction temperature range, otherwise specifications are at T
SYMBOL
Main Control Loops
V
V
V
I
V
V
g
I
DF
UVLO
UVLO Hyst
V
I
I
I
V
V
V
V
FB
Q
SENSE +
TEMP
TK/SS
m
IN
OUT
FB
REFLNREG
LOADREG
OVL
RUN
RUNHYS
SENSE(MAX)
SENSE(MAX)
MAX
PARAMETER
Input Voltage
Output Voltage
Regulated Feedback Voltage
Feedback Current
Reference Voltage Line Regulation
Output Voltage Load Regulation
Transconductance Amplifier g
Input DC Supply Current
Maximum Duty Factor
Undervoltage Lockout
UVLO Hysteresis
Feedback Overvoltage Lockout
SENSE
DCR Tempco Compensation Current
Soft-Start Charge Current
RUN Pin On Threshold
RUN Pin On Hysteresis
Maximum Current Sense Threshold
(E-Grade)
Maximum Current Sense Threshold
(I-Grade)
Normal Mode
Shutdown
+
Pins Bias Current
TAPE AND REEL
LTC3856EFE#TRPBF
LTC3856IFE#TRPBF
LTC3856EUH#TRPBF
LTC3856IUH#TRPBF
m
http://www.linear.com/leadfree/
CONDITIONS
I
I
(Note 4)
V
(Note 4)
I
(Note 5)
In Dropout; f
V
Measured at V
Each Channel, V
V
V
V
V
V
PART MARKING*
LTC3856FE
LTC3856FE
3856
3856
TH
TH
TH
TK/SS
IN
INTVCC
ITEMP
RUN
FB
FB
Measured in Servo Loop, ∆I
Measured in Servo Loop, ∆I
V
V
I
I
I
I
I
I
http://www.linear.com/tapeandreel/
LIM
LIM
LIM
LIM
LIM
LIM
Voltage = 1.2V, E-Grade (Note 4)
Voltage = 1.2V, I-Grade (Note 4)
= 1.2V, Sink/Source 5µA (Note 4)
= 4.5V to 38V (Note 4)
IN
RUN
= 0.5V, V
= 0.5V, V
Rising
= 15V
= 0V
= 0V
= Float
= INTV
= 0V
= Float
= INTV
= 0.3V
= 0V
Ramping Down
The
OSC
SENSE1,2
SENSE1,2
A
CC
CC
FB
= 25°C (Note 2). V
l
SENSE1,2
= 500kHz
denotes the specifications which apply over the full operating
= 3.3V
= 3.3V
= 3.3V
PACKAGE DESCRIPTION
38-Lead Plastic TSSOP
38-Lead Plastic TSSOP
32-Lead (5mm × 5mm) Plastic QFN
32-Lead (5mm × 5mm) Plastic QFN
TH
TH
Voltage = 1.2V to 0.7V
Voltage = 1.2V to 1.6V
IN
= 15V, V
RUN
= 5V, unless otherwise noted.
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
0.5955
0.593
0.64
MIN
4.5
0.6
3.0
1.0
1.1
93
25
45
68
23
43
66
9
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
0.600
0.600
0.002
–0.01
0.66
1.25
1.22
TYP
LTC3856
–15
0.01
2.0
4.0
3.2
0.6
40
94
±1
10
80
30
50
75
30
50
75
0.6045
0.607
MAX
0.02
–0.1
0.68
1.35
–50
5.0
3.4
1.5
38
70
±2
11
35
55
82
37
57
84
0.1
UNITS
mmho

3856f
%/V
mA
mV
mV
mV
mV
mV
mV
mV
nA
µA
µA
µA
µA
%
%
%
V
V
V
V
V
V
V
V